This is an absolute must-buy if you own a Playdate, and a really great value. If you've never done a nonogram puzzle before, it's an excellent introduction to the game, including lots of the quality of life improvements that have been added to various console versions over the years. Really well-designed interface and really fun.
If you do already like nonogram puzzles, here you get 250 of 'em, with the ability to download more and make your own (which people are sharing in the Playdate discord). This will be a permanent resident in my Playdate library.